AB 1573 inserts a unified definitions section into California’s housing element law to clarify which groups and housing types count when jurisdictions plan for housing for vulnerable populations. The bill gathers income categories, program terms, and a detailed definition of “target population” into one statutory place, with cross‑references to existing Health and Safety Code limits.
That consolidation matters because housing elements drive local planning decisions, eligibility for certain funding streams, and how jurisdictions describe needs and strategies for supportive and transitional models. By naming specific subpopulations and housing configurations, the bill narrows the interpretive space local governments, service providers, and the Department of Housing and Community Development (HCD) will use when assessing need and preparing compliance materials.
At a Glance
What It Does
Adds Section 65582 to the Government Code to supply uniform definitions used throughout the housing element article; it defines income categories by reference to existing Health and Safety Code sections, enumerates a broad “target population,” and defines housing types and services such as supportive housing, transitional housing, and ‘frequent user coordinated care housing services.’
Who It Affects
Local planning departments and councils of governments that draft housing elements, HCD staff that review those elements, homelessness service providers and supportive‑housing operators, and entities that administer state funding tied to housing element compliance.
Why It Matters
Standardized terminology reduces ambiguity in needs assessments and program eligibility but also fixes certain cross‑references and minimums into statute—changes that will influence how jurisdictions quantify needs and how providers design projects to fit housing‑element language.
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What This Bill Actually Does
AB 1573 does not create new programs; it creates a single, consolidated definitions section (65582) that local governments and HCD must use when applying the housing element rules that govern how communities plan for housing needs. Instead of scattering explanatory language across multiple statutes and guidance documents, the bill pulls key terms together—income bands, vulnerable populations, housing types, and service concepts—so everyone is literally working from the same dictionary.
The bill’s income definitions do not set new dollar amounts; they formally tie the statutory terms (acutely low, extremely low, very low, low, moderate, above moderate) to the thresholds already in the Health and Safety Code. That cross‑referencing matters operationally: when a housing element or a program report refers to “lower income” it now uses the bill’s umbrella definition, which explicitly includes several nested income categories.On populations and project types, the statute spells out who counts as the ‘target population’—people with disabilities, those eligible under the Lanterman Act, victims of domestic violence, certain crime victims, veterans, people exiting institutions, young people leaving foster care, and people experiencing homelessness, among others.
It also defines ‘supportive housing’ (no length‑of‑stay cap and linkage to services), ‘transitional housing’ (rental developments with time‑limited assistance and unit recirculation after a minimum six‑month period), and a version of housing tied to frequent users of emergency services. Those definitional choices will shape how jurisdictions describe and plan for housing needs, and how project sponsors structure occupancy, services, and reporting to align with housing‑element language.Because these are statutory definitions rather than guidance, HCD and local planners will likely treat them as the baseline for whether a plan’s programs and quantifyied objectives correctly address needs.
That raises implementation questions—how to measure eligibility for broad categories like ‘target population,’ how to align funding program rules that use different definitions, and how to document supportive services and occupancy rules so projects are recognized in housing elements and by funders.
The Five Things You Need to Know
Section 65582 establishes a single definitions section to be used across the housing element article rather than leaving these terms scattered in guidance.
The bill ties income-band terms (acutely low, extremely low, very low, low, moderate, above moderate) to existing Health and Safety Code sections instead of creating new numerical limits.
‘Target population’ is an expansive, enumerated list that includes persons with disabilities, Lanterman Act‑eligible individuals, victims of domestic violence, victims of sexual assault, victims of human trafficking, veterans, people exiting institutions, youth aging out of foster care, families with children, and people experiencing homelessness.
‘Supportive housing’ is defined as housing with no limit on length of stay for residents from the target population and must be linked to onsite or offsite services; ‘supportive services’ are explicitly described to include case management, medical/mental health care, substance abuse treatment, employment services, and benefits advocacy.
‘Transitional housing’ is defined as rental developments operated under program rules that terminate assistance and recirculate the assisted unit to another eligible recipient at a predetermined future point no less than six months from the start of assistance.
Section-by-Section Breakdown
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Income bands and basic program terms
These subsections anchor income‑category terms to the Health and Safety Code (for example, moderate income refers back to Section 50093). Practically, that means any use of those labels in the housing element context—needs inventories, site suitability, or program descriptions—must map to the same statutory income thresholds already used in state housing programs. The text also includes basic administrative definitions (department, council of governments, locality) and retains the established meaning of emergency shelter by reference to Health and Safety Code language.
Housing types, services, and occupancy rules
This cluster defines programmatic housing concepts: supportive housing (no fixed stay limit and linked to services), transitional housing (rental configuration with time‑limited assistance and unit recirculation after at least six months), and the scope of supportive services. Because those phrases often determine whether a project counts toward an element’s strategies or qualifies for certain funding, the statutory text sets concrete operational expectations—what services look like and how long assistance may be structured for transitional units.
Frequent user coordinated care housing services
The bill creates a named category for housing combined with services targeted to persons identified by a city or county as the ‘most costly, frequent users’ of publicly funded emergency services. This definition leaves the identification criteria to local governments, which preserves local discretion but also shifts a measurement burden onto jurisdictions that will need to document who the frequent users are and why the housing‑plus‑services model applies.
Expanded, enumerated 'target population'
The act provides a long, nonexclusive list of subpopulations that qualify as the target population—linking disability, statutory program eligibility (Lanterman Act), several categories of victimization, veterans, institution exits, foster‑care youth, families, elderly persons, and homelessness. By statute‑ifying this list, the bill narrows interpretive gaps that previously existed when jurisdictions described which vulnerable groups their programs serve, but it also creates questions about overlap, prioritization, and documentation when multiple categories apply to a single individual.
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Explore Housing in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- People experiencing homelessness and members of the enumerated target groups — clearer statutory definitions reduce administrative disputes about whether they count in local needs assessments and program targeting, which can streamline project design and eligibility determination.
- Supportive‑housing and transitional‑housing developers — a statutory baseline for what constitutes supportive services and occupancy rules can make it easier to align project design with housing element descriptions and certain funding applications.
- Local planners and HCD reviewers — having a single definitions section simplifies consistency reviews and reduces interpretive variability when assessing whether an element’s programs address particular needs.
Who Bears the Cost
- Cities, counties, and councils of governments — must update housing elements, needs inventories, and program descriptions to reflect the statutory definitions and may need additional analysis or documentation to show compliance.
- Service providers and project sponsors — may need to adjust program rules, documentation, or contract language (for example, regarding length of stay, service scopes, or eligibility verification) to ensure projects fit the statutory definitions used in housing elements and by funders.
- State agencies and program administrators — HCD and other funders may face increased demand for interpretive guidance and potential appeals if applicants and jurisdictions disagree on whether projects meet the new statutory terms.
Key Issues
The Core Tension
The central dilemma is between legal clarity and operational fit: the bill reduces ambiguity by fixing who and what counts in housing elements, which helps planning and oversight, but those same statutory definitions may not align neatly with program rules, funding contracts, or service delivery models—forcing jurisdictions and providers to choose between strict statutory compliance and practical program designs that meet local needs.
The bill uses cross‑references to existing Health and Safety Code income limits rather than setting new dollar amounts, which preserves alignment with other programs but also means future changes to those referenced sections will ripple into housing‑element language. That’s efficient, but it creates a dependency—authorities that update income limits (for rent ceilings, program eligibility, or RHNA translations) will indirectly alter what the housing element statute means without a separate legislative change to 65582.
The ‘target population’ list is expansive and overlapping. That clarity helps local planners justify programs aimed at discrete groups, but it raises administrative questions: which category applies for prioritization, how to count individuals in needs inventories without double‑counting, and how to verify eligibility for projects that rely on one narrow statutory descriptor.
The definitions for supportive and transitional housing impose operational expectations (no length limit vs time‑limited assistance with unit recirculation) that could conflict with existing funding program rules or lender requirements tied to specific occupancy or subsidy models. Finally, the ‘frequent user’ language delegates identification criteria to local governments; that preserves flexibility but shifts measurement burdens and could produce inconsistent applications across jurisdictions.
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